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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fad9bf673707dbbc866b64e79e1da59128a910f95120ec9bb7e937662bce639' 
  AND token = 'C5u8CN+x/Izz/LwAW/4t4o5vKEdt3seOTzmhamIaRcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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