Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e00277d5beeb70c9e51d171743340d540383edea415cf1ae1737f5eeb09de9bd' 
  AND token = '1ntWF/i+ZTukN1zbb39tAlO3bux/W2c+V6tiU6aMCDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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