Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e81ed7a192eabd81f0e1f91201d0727000aaac9e407ecd62a9715cc734010c93' 
  AND token = 'jR2E3UlPpgm7r6RwZq7MLx/zd3yL85WOAwfJkqMcTRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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