Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e2a90af127c5e50465810cfb301539dc4432e4e0c095016c9888ac502d87524' 
  AND token = 'Qd0ggZWL+rTy8o+k+EJdHKEcJIH4YPZ5zqm+kwML004=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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