Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e3bd6336b47d9e83fa1e71fb3fcbd5e378430cf6d59d166e994c2f19a0eff45' 
  AND token = 'Kkw7lqhIC5eVTWvizmtdTGXk75WYPXteDG0SeZjNIN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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