Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab6b175e64496a5d6f4bf4ef9686aae84a2576af06ee66fec9ca6d1ed4e6b5da' 
  AND token = 'aLCdL7ZAgryySUozjMsbS3V8CEn4w693OWKSoq/aaF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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