Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51535a72a30dfd5a8f34fe88000931ebbb04736a3a1672131dfac6a46268242a' 
  AND token = 'R/F6jtVA/R8/P+BIH0qzw64+LnGqX767dXl9WdXDnq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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