Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce75ca6c8138279f8673bea8537af6ecbab5ebd3acbe488eb6535d3c5a700ba4' 
  AND token = '9Yr0v/X1P30VZLeMuZMvNcs5htIX+J009+FgcPV9Bsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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