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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '036671e8ddf3aa13322d31cb69d79f02aa60e1e1d209a902179a8bb83a5fa1f0' 
  AND token = 'AMkc4M8o3qEpzSAItf0y1f94eToFRLyYW/yamqBGBa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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