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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22de4e701a3747b66369db22fca8d56a043abc74d150cb3b2b4243e2b36b875d' 
  AND token = 'GnnQ6/QwkRT9OC4iMS7fuPPPZiPeysx2/qunlf9INVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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