Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ae1fa084d3593074706dca803ceeed3636dd02aa6ff4a3438794a589a2959cf' 
  AND token = 'Z+HOUUHxk7PST3IGaSG8qjHPMtTR62W7LsUUO0CH1Uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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