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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19006b335dbd8a87b7a3385825f5dae38e983a5cadd7b04ef8aa230c65b64a40' 
  AND token = 'CwKXf5xBE48cZBoHUbPzc/yqQ3A5oN5UB5Sg/r+VRqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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