Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18c64351d05b14d3d17b039556669de20209da3850b29a8d982ccb0158b81b16' 
  AND token = 'YKRCtqmnRmScU93vg2esvvPU8x0kF77YeiVZ0ZTuA2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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