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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '084c8c51636d1e5fe1bf4aef6079076b26dfd1bb56786c636b484fa906acecc5' 
  AND token = 'GBbK2t4zLlqV+wkLK44Ct3ApkucfZB2xEQDtmQo8Eao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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