Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba7db759327839500f9583c59b4fbc4a57b15f337531a2c4a2a00aa3c70c4e47' 
  AND token = '8UVb70vzRgtHiY0WK5SO8E7QtewTBm2MypIMxt45ISg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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