Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0ce6fa5dbf6a51f9f0cbf19204689f5e161fd09ad9248c3d11f5932c4b08f70' 
  AND token = '0l2J3HJzoaIfR+jc3hXTt4dwifOJA3oRXOKOoELOWTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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