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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d4e8c8573ea29cb9801d78fde81a9e34b65343e1eed635cd6577e7644bccc47' 
  AND token = 'N0D1Xhb3jXjpuIqgiUIUBC4qke/imNUYkoC4nwCgY2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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