Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a597593f6ffd3f3797e5932e851396746a9522039697220b03fbd1090d0eb87' 
  AND token = '+3M+T4IpC3fNoSjJqWP+XYmtjK7SHHYFmu1y5y8DhrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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