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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba2ae5aaaf1f29ba79b7578102cc9a1d07aa22a2ad0b9bd454a6afe6166e93d0' 
  AND token = 'aFTwz3dJqx1N6tFsNSUu9EPvYbptGx065Bg7ntLj/jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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