Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f63b3703681da1d3bb6331396db6fb3735a1eb80dcca7009976d633e1a8420d' 
  AND token = 'bROQ7X2cB9yhfp1ILlN4wikMmOLVjt+wIKoEU+gc/Sc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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