SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1195c2b7434057dd1aab9e433c3f6a716279142613f34e85a0fd8147d912fc29' 
  AND token = '4e8sUcgkzzl7O2Zb2NWu/lgp6FKzdQUiXVHJO/zi6Hw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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