Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63c25ffcdadceeb67ba1ef1ecb05c96a22966260b5c3ac387406f86cd7b9fcaa' 
  AND token = '6wMOgjnFExVVvfutPH/Q/tCWnzwdiiAthfr41opo8PA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}