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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '194ebd0913bb419158e9f15e16eb6abb82c91f06b1efcb5c0dd11fe0943cb408' 
  AND token = 'knSsEJM1ipuIhCG0CM8vbANJCaDbTymgzVhnunGJJYs=' 
  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"
    }
  }
}