Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faf27ddd8c25fabb2ae4b082cf7387c0965a60cd3d3e11d55cfaa15a580a30d5' 
  AND token = 'ZvlpcB6et6+iXLX/6OSPuTq6ycJlYutNUV1A02/YqbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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