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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ab1c48a5bd6b29b0c392f02476bf7d233a9ea16565da259407d9a21df8d732d' 
  AND token = 'qN8GzfE58PWaOYA028fWDudOjGFGc4l/Hc5DpVyL/WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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