Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17f85c4e69dbbb8abbd448ae8fa92b22ddc94696d27db6c35bf6d3ea76950f7a' 
  AND token = '1P373TdzMd+d9fccxWJA/Gah1i98iS7/WatGUycQSWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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