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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f31cfe02e4d90ba3b4b3f58c190d30e15b27054a70093e619128888c182045' 
  AND token = 'Pvbsbc/jnOibSTeGntxa8CAHwY1atm6BmUuDJsQTJVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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