Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ebbf28499e9afa380ded63375ceca2c615fdf5aa493700145ae5fc9402241ff' 
  AND token = 'Aotj0tKjayMEBJVSkkHqNH8f465NexcFTEcAzoLCgec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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