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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '310f64c2d58a14e15ea7cf932105c15f90edff49ee21897936416de1432437d7' 
  AND token = 'KFcvo2Qv2n0lDJQ60i9QmN767pj8ceouTVneabjvByA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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