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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e9978649b45319dc94b9daae440d6bec11039f40e7b35c5c066997590dbbb6f' 
  AND token = '+gOFqS10zBw7LxSGD+vQn7g1U1D7RPswqB6Hfbq9gtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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