Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '919f90f3182380684860a1489a8cbe00527fd2fb73d6bdd42cfe5bc1b1899289' 
  AND token = 'KMCm6w14CtjJ/Xds8MVb4HGa6UsaZPfFDORGK7qnse4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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