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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '9d2d4629c2a7a584894c4f1a005cec3f33d195ee0c2217e53883f12a5237d065' 
  AND token = 'W1gZhVDnCqmlEA2oYHtSmFuwDM67rPiiUh5GIjhec0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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