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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b5149ecf5b944f681a0f4aed17207ac1c99447a4bbd6555ba11d23c2feeaff5' 
  AND token = 'Wh5zooEZvtfM6jn0KrjtU7gwygWRJsassXVcZWVSc0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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