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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e243f3008cdbe8fff6c99ac0adf0878daf2a45f039babc630a5e2c5b2fb62df' 
  AND token = 'dKbx3ZXjeCLKIHf/BuAJglR0VZhfwN7yFc3CKsl6v4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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