Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb3e5735cefb9e67f09e28ae4f939470100acc04d310efa6618e96ba5f4f0df9' 
  AND token = 'zVoD9VgcejCkKlgRmZiSJyaI6VK0Iearu2dLUMBsBJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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