Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca82aa4abef0bfde8a7a997ede29518038ca70381de2bf46e80d32e9dfda2871' 
  AND token = 'dtydPjnG8SduKFQyJ8khP6s9y/p+mHykjOjx0nV3Vso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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