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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25bb8b4e87ba29c671ebdbc09bbb5ae4557a0b4afde3e83147ce3a3e63e8993b' 
  AND token = 'yFRCgYi3R/ecOvK8GE8Sp6El2V1AmivwnwEJsAxbwuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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