Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9861a649d098eb24199abccb413b2e1446149c40ede9e4982ee052dbe13a861' 
  AND token = 'GJ4mc+8qtiFZ3Z3mCwAJORz1oh796R/KLN3LtKjPzEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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