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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e53e7f1eb0c0954b085b81ee18e5d0c38269e18895197475b00f9e2525d040a' 
  AND token = 'zItMQHVywFPE8nOU9iAZvSuK9bQx6xuhZpd0lUvHMjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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