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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ea28b9ba6830ceea1dcd7bd11d8d522ce7658df6191b47d7ab9daeb30eb1d6ef' 
  AND token = '406b7RUeiAah1xi/798PmV8BHXXfLArCqw/HupSzAT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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