Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e4850228a2c85c2342312bba4dd437d079de06a7cb0bb49b0cace88b4461d5e' 
  AND token = 'kT0xOUF8tMSAYwGbClsPxTVVnmbd2COVDhZG2gHjZis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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