Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd756d3e191addedf12d794476dd769bdbb1e6878e9727352a785b9aaf426f0e9' 
  AND token = 'V9hOfuh3DXXFPnz7H45kUy3HPFL5983mnZpEmX98JEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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