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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '096c2c12ab41c284f0d405aab6fd631ae4074f0f27a4ee780396e6feb0678ab1' 
  AND token = 'c7X42RsC32TvogoPVvGb2rJR27gHrhS1O4nDnr+miNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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