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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33c89b0453faa5c71125e9c113bac22c49285e00ba8b5a734d1081d93b44d1e6' 
  AND token = 'w5EuGetCcFJlHHfEWuTFvRXSPuNIcm5raDXWoWzwlCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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