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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2b5a5556b8b0c955de3b70e0cae28a15cd858daf369728cc327ca2c07ad0bd2d' 
  AND token = 'IDKLNv3MDYhPmwRvCepdFBx27+5BX7w9QKpAKn3uggk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}