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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb2abc551b1d58d2e82866a12e8b8ef951a0174c47f47ff9e133d12ab8989917' 
  AND token = 'ZGCgaZOevFfWv9ZETTj4or7KZvj9On/O7ri6L+8gjTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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