Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f0ca744a903f4b54ac62f1918aff2a36c04ac1d48ec8972d4191a1b4af3bd63' 
  AND token = 'EP5WVxAu9PflP9hf1S5OIGZ/zfR0nwHU8J6+/Hdu9ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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