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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32f97b4c61b7448a3570f1e394c9aaf1d844a519b39f6ecae9c4122b93125fd3' 
  AND token = 'VZGQxH15ZXITusz00t+M32TrgIe9cwyPLEB2l+HngS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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