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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8181d391f7684514f62af8e45e1f5b8716212e58907cdea2340287b9989f5c88' 
  AND token = '2MJ9UI9rdhTg5aEbMWyf+uPPBNGf7YfXb8mVayHB2ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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