SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf92d3b4250744b7ce67dec1f984058e2025c768ad5116d7497fd6b85af341af' 
  AND token = 'U9oApGTQyAGigRU3/rVx3wWSo8L953xdznK5hs0r6Co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00116

JSON explain

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