Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb3459e2f8b70ed78fbf2b0635b51953db530a8c4e349f445406300d08204dcb' 
  AND token = 'ijRM8mmpZyhrcBDRbhjPZqZ3WBOxx6rSSEyDyxIlf7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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