Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba0e06cb86d54f678dbc657d890fddd31305d16b957313cda7c7e2f2468dda2' 
  AND token = '6TRoHgj85aGCCytocYo7TFA7ftY6hL6IWKdTrl3iUR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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