Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '618e68ac4ebe01c9ae78dca1283864ac887677b15b6ba4f813c332038e74d7ce' 
  AND token = 'E0e6mW3NCF25Pk3u0KgcJmLuNAKjdcj4PRuuyzKA0qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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