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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e2e59352adc909843e081ecdb7d00f6516c6b81f9bd32db04306620c9741ff5b' 
  AND token = 'UYiGCKT3x09blRpf9teem60OpNS5aTPnyCSsSG0H7aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}