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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4037f65088f7eeb875f6a7b46f5319452b78d5d1bb48f0f5a4f5d434a7d7283' 
  AND token = '9fzxma6Tg3dDrUL4bW7CKriybPtXq1yoa1MA0p3xkkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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