Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4476f2f37669167886b91c4c4f3f9f599b86969c1e1f0e9bdb50718b32862b06' 
  AND token = 'PxMXcVGUjR73IV/D0zxHei23EtRxfZrwReAAU0HJlDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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