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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eaa17403c36f8d611fc53fd3d3a0df9cd6910fa4cebb10a85b37f64c5a2444dc' 
  AND token = 'kgD4aXIyqLkLxpi9xNYJDJRxw/AyG4M8LXDPjNCg3tM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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