Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b7dac1eedd8c22804862cf5f91ce6f923fc097a2a96c77885693391000c0e7' 
  AND token = 'AbPy1UXenaef1tsmmNSQc3XqqDh7NaQT3nAqYmhDZDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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