Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58fed780e7c6ec89721073ddd0cc8735154d335c019c61eb53569c4b258887cd' 
  AND token = 'FHCuSRImH5kGkUcog3Gk2BhqpRmOl2uL3ibifti1yVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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