Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1898d5bf4ac34f8993728afca829cccd3c03c8fe53573f9b0c6e7c322d1827' 
  AND token = '7fNQmJhRVmaokG30xPdmxRI33Rkml0N5iDQHsYT7AK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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