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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9efddb1ae3e36877cb225fc37fff88011e2f9671b3167369d03662e1ea252bfb' 
  AND token = 'WHiCRnClmZ1fl3zQQQzzPPIdgvDfFyI1dGdUKUgzGdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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