Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb236829c7d4fc2f8bdd75912aa48419c519cdb3a17aae400fea2b5c16b9658a' 
  AND token = 'J63VbcuMjbOxiyxzw9rQzjTMTppTk/ViMgf+2oqMBOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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