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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '377a730d11828d68540ef7d2a6943022ca59c8fdf2f27dda5fda8e59d65038f6' 
  AND token = 'yuxJD0h24BlEYpL38d7iyl8oZqqt5Ukr3AsBTj6s+pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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